Spring



Aug. 18, 1931. B. R. DEXTER 1,819,281'

SPRING Filed Nov. 9, 1925 Patented Aug. 18, 193 r UNITED STATES BENJAMINIt. LDEIX'ILIEEZR, F OAKLAND, CALIFORNIA SPRING Application filedNovember likely to get out of order, and is well adapted to perform theservices required of it. While my improved spring may be formed in anysuitable manner and of any suitable material, yet it is preferable toform the same of light but strong sheet metal resilient material, onaccount of the cheapness of the leather.

Other objects and advantages of the invention, not at this time moreparticularly enumerated, will become readily apparent as the followingdetailed description is pursued.

A preferred embodiment of the invention and a slightly modified form ofthe same is shown in the accompanying drawings in which Figure 1 is adiagrammatic view showing how the preferred form of my invention isconstructed;

Figure 2 is a view similar to Figure 1 showing the spring in the secondstep employed in manufacturing the same;

Figure 3 is a diagrammatic view showing the first step in manufacturinga modified form of my invention;

Figure 4 is a diagrammatic view showing the second step used inmanufacturing this modified form of invention;

Figure 5 is a side view of the preferred form of my invention; and

Figure 6 is a sectional view taken thru a spring constructed inaccordance with the modification shown in Figures 3 and 1.

In the above mentioned drawings, like reference characters designatelike parts thruout, and referring particularly to Figures 1, 2, and 5,the spring may be made 9, 1925. Serial No. 67,716.

of a single strand or strip of metal 10, folded as at 11 to provide arms12 and 13 respectively. Each arm 12 and 13 is folded laterally over eachother alternately. As

shown in Figure'2, the arm 12 has been folded over the arm 13. The nextstep will be to fold the arm 13 laterally over the arm 12 until a builtup springconstruction is formed. It will be seen that the arm 12 isfolded from back to front and front to back, while the arm 13 is foldedfrom side to side in between the folding of the arm 12. The completedspring is shown inFigure 5.

In. the modified form of" the invention, shown in Figures 3, 4, and 6, apair of sheet metal strips 17 and 18 are placed upon each other as shownin Figure 3. The strip 18 is bent upon itself as-at 18, and the strip 17is folded over the strip 18 to perform the first step in manufacturingthe spring,

as shown in Fig, 4. The strip 18 is then folded over the strip 17 fromfront to rear, and the strip 17 is then folded over the strip 18 fromside to side. This operation is continued alternately until a built upspring construction is formed. The completed spring construction isclearly shown in Figure 6 which is a sectional view.

The above mentioned parts are believed to adequately define myinvention. The spring thus formed and shown in Figures 5 and 6 inassembled position is easily made and possesses a considerable inherentdegree of resiliency. The springs may be constructed with sharp edges asshown in Figure 5 or with rounded edges as shown in Figure 6, thesedetails in manufacture being unimportant. Other like changes may beresorted to without departing from the spirit of the invention, and thusonly inso-' far as I have particularly pointed out my invention in thefollowing claims do I desire to be limited. The springs formed incarrying out my invention are adapted for a number of uses. They areparticular ly valuable for a cushion spring for automobiles and undersmall jolts, the spring functions by the resiliency of the metal for itis highly compressed. The cross-woven strips contact and bringfrictional resistance;

into play, thereby limiting the amount of compression. Also, on therebound, the spring would extend beyond its normal position, bringingthe metal strips again into close frictional contact, and thus limitingthe amount of rebound. It will be then seen that this type of springrelies on the resiliency of the metal for small amounts of movementwithin limits and on higher compression or extensions, the frictionalresistance of the contacting strips is brought into play. .c

Having described my invention, what I claim is i lhA spring comprising acontinuous strip of resilient metal, said strip being bent diagonallyintermediate its length,ithe extending lengths of said strip beingtransversely interwoven one relative to the other. 2. A springcomprising a continuous strip of resilient material, a diagonal bendintermediate its length providing a reenforcing and tie member at oneend of the spring, the angnlarly projecting lengths of said strip beingtransversely interwoven one relative to the other.

3. A spring comprising a continuous i stripof resilient metal providedwith a full diagonal. bend adjacent the longitudinal center providing atie and reenforcing means, the extending lengths being transverselyinterwoven one relative to the other and in spaced relation. H

In testimony whereof I afiix my signature'.

BENJAMIN n. DEXTER.

